Unable to load local library via GUI

Hi all,

I have an interesting issue specific to the Mac R.app, but not to the command line R or Rstudio.
I have looked through the archive, however most of the threads seem to be for std packages, and further, most of what is said is a little beyond me, so any help with the problem below would be really appreciated.

I have a locally developed library (libmlalgs), which I am able to install via the command line:
sudo R64 CMD INSTALL libmlalgs
In the /Library/Frameworks/R.framework/Versions/2.13/Resources/library/libmlalgs there is a .so file
/Library/Frameworks/R.framework/Versions/2.13/Resources/library/libmlalgs/libs/x86_64/libmlalgs.so

This runs and installs OK.
I am able to run R64 in the command line and load the libmlalgs library fine :)
I am able to use Rstudio and load the libmlalgs library fine.

However, when using the R64.app and try and load the library within the GUI I am getting the following error:
Error in dyn.load(file, DLLpath = DLLpath, ...) : 
 unable to load shared object '/Library/Frameworks/R.framework/Versions/2.13/Resources/library/libmlalgs/libs/x86_64/libmlalgs.so':
 dlopen(/Library/Frameworks/R.framework/Versions/2.13/Resources/library/libmlalgs/libs/x86_64/libmlalgs.so, 6): Library not loaded: libRblas.dylib
 Referenced from: /Library/Frameworks/R.framework/Versions/2.13/Resources/library/libmlalgs/libs/x86_64/libmlalgs.so
 Reason: image not found
Error in library(libmlalgs) : .First.lib failed for 'libmlalgs'

I know the libmlalgs.so is in the right place and the permissions look OK:
-rwxr-xr-x  1 root  admin  58384  3 Oct 14:30 libmlalgs.so

So I am stumped as to why the GUI is unable to read the file.

Any pointers would very welcome. As I am a textmate user and it passes the code to the R64.app, I currently stuck with either command line or Rstudio (it's nice but is currently missing some key features textmate has)

Specs:
Running Mac OSX 10.7.1
R version 2.13.1 Patched (2011-08-14 r56741)
Copyright (C) 2011 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

Many thanks,
Noel Faux

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NHMRC Post Doctoral Fellow
Australian Imaging Biomarker Lifestyle (AIBL) flagship
Mental Health Research Institute
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